<template>
    <div>
        <!-- 面包屑导航区 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home'}">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card class="box-card">
            <!-- 搜索与添加区域 -->
             <el-row :gutter="20">
                 <el-col :span="8">
                    <el-input placeholder="请输入内容"  class="input-with-select" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                 </el-col>
                 <el-col :span="4">
                     <el-button type="primary" @click="addDialogVisible=true">添加用户</el-button>
                 </el-col>
             </el-row>
             <!-- 用户列表区域 -->
             <el-table :data="userlist" border stripe>
                 <el-table-column label="#" type="index"></el-table-column>
                 <el-table-column label="姓名" prop="username"></el-table-column>
                 <el-table-column label="邮箱" prop="email"></el-table-column>
                 <el-table-column label="电话" prop="mobile"></el-table-column>
                 <el-table-column label="角色" prop="role_name"></el-table-column>
                 <el-table-column label="状态" prop="mg_state">
                     <template slot-scope="scope">
                         <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
                        </el-switch>
                     </template>
                 </el-table-column>
                 <el-table-column label="操作">
                     <template slot-scope="scope">
                         <!-- slot-scope="scope" -->
                         <!-- 修改角色按钮 -->
                         <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                         <!-- 删除角色按钮 -->
                         <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                         <!-- 分配角色按钮 -->
                            <el-tooltip effect="dark" content="分配权限" placement="top" :enterable="false">
                                <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRoleDialog(scope.row)"></el-button>
                            </el-tooltip>
                     </template>
                 </el-table-column>
             </el-table>
            <!-- 底部分页功能 -->
            <el-pagination
            @size-change="handleSizeChange"
            @current-change="handleCurrentChange"
            :current-page="queryInfo.pagenum"
            :page-sizes="[1, 2, 5, 10]"
            :page-size="queryInfo.pagesize"
            layout="total, sizes, prev, pager, next, jumper"
            :total="total">
            </el-pagination>
        </el-card>
        <!-- 添加用户的对话框 -->
        <el-dialog
        title="添加用户"
        :visible.sync="addDialogVisible"
        width="50%"
        @close="addDialogClosed"
        >
        <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
        <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 修改用户的对话框 -->
        <el-dialog
            title="修改用户"
            :visible.sync="editDialogVisible"
            width="50%"
            @close="editDialogClosed"
            >
            <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="70px">
                <el-form-item label="用户名">
                    <el-input v-model="editForm.username" disabled></el-input>
                </el-form-item>
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editForm.email"></el-input>
                </el-form-item>
                <el-form-item label="手机号" prop="mobile">
                    <el-input v-model="editForm.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>
        <!-- 分配权限对话框 -->
        <el-dialog
        title="分配角色"
        :visible.sync="setRoleDialogVisible"
        width="50%"
        @close="setRoleDialogClosed"
        >
            <div>
                <p>当前的用户:{{userInfo.username}}</p>
                <p>当前的角色:{{userInfo.role_name}}</p>
                <p>
                    分配新角色：
                      <el-select v-model="selectedRoleId" placeholder="请选择">
                        <el-option
                        v-for="item in roleslist"
                        :key="item.id"
                        :label="item.roleName"
                        :value="item.id">
                        </el-option>
                    </el-select>
                </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
    export default {
        data(){
            // 验证邮箱的规则
            var checkEmail=(rule,val,cb)=>{
                const regEmail=/^([a-zA-Z]|[0-9])(\w|\-)+@[a-zA-Z0-9]+\.([a-zA-Z]{2,4})$/
                if(regEmail.test(val)){
                    return cb()
                }
                cb(new Error('请输入合法邮箱'))
            }
            //验证手机号的规则
            var checkMobile=(rule,val,cb)=>{
                const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/
                if(regMobile.test(val)){
                    return cb()
                }
                cb(new Error('请输入合法手机号码'))
            }
            return {
                //获取用户列表的参数对象
                queryInfo:{
                    query:'',
                    //当前的页数
                    pagenum: 1,
                    //当前每页显示多少条数据
                    pagesize: 2
                },
                userlist:[],
                //总数据条数
                total:0,
                //控制Dialog对话框的显示与隐藏
                addDialogVisible:false,
                //用户的表单数据对象
                addForm:{
                    username:'',
                    password:'',
                    email:'',
                    mobile:''
                },
                //用户的验证规则对象
                addFormRules:{
                    username:[
                        {required:true,message:"请输入用户名",tigger:"blur"},
                        {min:3,max:10,message:"用户名的长度在3~10个字符之间",tigger:"blur"}
                    ],
                    password:[
                        {required:true,message:"请输入密码",tigger:"blur"},
                        {min:6,max:16,message:"用户名的长度在6~16个字符之间",tigger:"blur"}
                    ],
                    email:[
                        {required:true,message:"请输入邮箱",tigger:"blur"},
                        {validator:checkEmail,tigger:"blur"}
                    ],
                    mobile:[
                        {required:true,message:"请输入手机号码",tigger:"blur"},
                        {validator:checkMobile,tigger:"blur"}
                    ]
                },
                //修改用户Dialog的显示与隐藏
                editDialogVisible: false,
                //修改表单绑定的数据
                editForm:{},
                //修改表单的校验规则对象
                editFormRules:{
                    email:[
                        {required:true,message:"请输入邮箱",tigger:"blur"},
                        {validator:checkEmail,tigger:"blur"}
                    ],
                    mobile:[
                        {required:true,message:"请输入手机号",tigger:"blur"},
                        {validator:checkMobile,tigger:"blur"}
                    ]
                },
                //分配权限对话框的显示与隐藏
                setRoleDialogVisible:false,
                //需要被分配角色的用户信息
                userInfo:{},
                //角色数据列表
                roleslist:[],
                //下拉菜单绑定的value
                selectedRoleId:''
            }
        },
        created(){
            this.getUserList()
        },
        methods:{
            async getUserList(){
                var {data:res}=await this.$http.get('users',{params:this.queryInfo})
                if(res.meta.status!==200) return this.$message({showClose: true,message: res.meta.msg,type: 'error',duration:1000})
                this.userlist=res.data.users
                this.total=res.data.total
            },
            //监听pageSize改变事件
            handleSizeChange(newSize){
                this.queryInfo.pagesize=newSize
                this.getUserList()
            },
            //监听页码值改变的事件
            handleCurrentChange(newPage){
                this.queryInfo.pagenum=newPage
                this.getUserList()
            },
            //监听switch开关状态的改变
            async userStateChanged(userinfo){
                var {data:res}=await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
                if(res.meta.status!==200){
                    userinfo.mg_state=!userinfo.mg_state
                     return this.$message({showClose: true,message: res.meta.msg,type: 'error',duration:1000})
                }
                this.$message({showClose: true,message: res.meta.msg,type: 'success',duration:1000})
                this.getUserList()
            },
            //关闭添加对话框时清空表单
            addDialogClosed(){
                this.$refs.addFormRef.resetFields()
            },
            //关闭修改对话框重置表单(校验规则)
            editDialogClosed(){
                this.$refs.editFormRef.resetFields()
            },
            //点击按钮添加用户
            addUser(){
                this.$refs.addFormRef.validate(async valid=>{
                    if(!valid) return
                    //表示校验通过发起添加用户的请求
                    const {data:res}=await this.$http.post('users',this.addForm)
                    if(res.meta.status!==201) return this.$message.error('添加用户失败')
                    this.$message.success('添加用户成功')
                    this.getUserList()
                    this.addDialogVisible=false
                })
            },
            //展示编辑用户的对话框
            async showEditDialog(id){
                var {data:res}= await this.$http.get('users/'+id)
                if(res.meta.status!==200) return this.$message.error('查询用户信息失败')
                this.editForm=res.data
                this.editDialogVisible=true
            },
            //修改用户信息并提交(首先进行表单预校验)
            editUserInfo(){
                this.$refs.editFormRef.validate(async valid=>{
                    if(!valid) return
                    //发起修改用户信息的数据请求
                    const {data:res}=await this.$http.put('users/'+this.editForm.id,{
                        email:this.editForm.email,
                        mobile:this.editForm.mobile
                    })
                    if(res.meta.status!==200){return this.$message.error('更新用户信息失败')}
                    //将服务器数据重新获取一次渲染到页面上(刷新页面)
                    this.getUserList()
                    //关闭editDialog对话框
                    this.editDialogVisible=false                   
                    //弹出更新用户信息成功的消息提示
                    this.$message.success('更新用户信息成功')
                })
            },
            //删除用户按钮的事件处理函数
            async removeUserById(id){
                //首先提示弹框确认用户是否删除
                var confirmResult=await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
                }).catch(err=>err)
                //如果用户确定删除则返回字符串为confirm
                //如果用户取消删除则返回字符串为cancle
                if(confirmResult!=='confirm'){
                    return this.$message.info('取消了删除')
                }
                //如果点击了确定按钮我们就发起删除请求
                const {data:res}=await this.$http.delete('users/'+id)
                if(res.meta.status!==200) {return this.$message.error('删除用户失败')}   
                this.$message.success('删除用户成功')
                this.getUserList()
            },
            //点击分配按钮事件
            async showSetRoleDialog(userInfo){
                this.userInfo=userInfo
                //在展示对话框之前,获取所有角色的列表
                const {data:res}=await this.$http.get('roles')
                if(res.meta.status!==200) return this.$message.err('获取用户列表失败')
                this.roleslist=res.data
                this.setRoleDialogVisible=true
            },
            //点击按钮分配角色
            async saveRoleInfo(){
                if(!this.selectedRoleId){
                    return this.$message.error('请选择要分配的角色')
                }
                const {data:res}=await this.$http.put(`users/${this.userInfo.id}/role`,{rid:this.selectedRoleId})
                if(res.meta.status!==200){return this.$message.error("分配角色失败")}
                this.getUserList()
                this.$message.success("分配角色成功")
                this.setRoleDialogVisible=false
            },
            //dialog对话框关闭做的函数
            setRoleDialogClosed(){
                this.selectedRoleId=''
                this.userInfo={}
            }
        }
    }
</script>

<style lang="less" scoped>

</style>